Preparation fpr new mareike & solea module

modules/event-participants/Controllers/class-main.php

@@ -40,11 +40,27 @@ class MainController
     }
     public function __construct()
     {
-		global $dbHandler;
+		global $dbHandler, $wpdb;
 
-	    add_menu_page(
-		    __('Events', BDP_LV_PLUGIN_SLUG),
-		    __('Events', BDP_LV_PLUGIN_SLUG),
+		$show_menu = false;
+
+	    foreach ([self::KOMPASS_EVENTS_EVENTS] as $table) {
+		    $sqlTable = $wpdb->prefix . $table;
+		    $sql      = "SHOW TABLES LIKE '$sqlTable'";
+
+		    $result = $wpdb->get_var( $sql );
+		    if ( $result == $sqlTable ) {
+			    $show_menu = true;
+		    }
+	    }
+
+		if (!$show_menu) {
+			return;
+		}
+
+		    add_menu_page(
+		    __('Events (legacy)', BDP_LV_PLUGIN_SLUG),
+		    __('Events (legacy)', BDP_LV_PLUGIN_SLUG),
 		    'send_mails',
 		    'kompass-events',
 		    [$this, 'router'],